I don't plan on installing a custom ROM just yet (although I'll probably switch to CyanogenMod in the not-too-distant future), so I'm currently still using the regular Sense ROM that came on the phone. It's detected an available system update, so there's a constant "Tap to download the system update" notification in my tray.
My question is, if I let the phone download and install that update, firstly is it safe considering the modifications I've made, and secondly will it undo any of those modifications? (e.g. un-rooting the phone, or setting it back to S-ON) The Nandroid backup is all well and good, as long as I can still put it back on there with Clockwork, which I'm worried I might not be able to do.
If anyone knows the answer, it'd be a very great help. Thanks in advance.